See your eye doctor: For your symptoms of floaters you should see your eye doctor right away to see if it's the sign of a serious problem. As for your other symptoms, they should warrant some further testing.
I believe that it is correct to say that RNA is not replicated, but reproduced. DNA, what I know currently, is the only one that replicates itself.   Plus, to my knowledge, you don't need to copy a RNA strand.
The primary difference between transcription and DNA replication is that only a single strand of mRNA is produced during transcription. During DNA replication both strands need to be copied and DNA polymerase needs to work on both strands at the same time. Because DNA polymerase can only add new bases onto the free 3â end of a molecule the two strands cannot be synthesized in the same way. The leading strand is synthesized as a continuous chain. The lagging strand is synthesized in pieces. In contrast, the single mRNA molecule is synthesized as a continuous strand. The other difference between the two processes is that during DNA synthesis the entire chromosome is copied. During transcription specific genes are transcribed in response to signals such as transcription factors. View the animation below, then complete the quiz to test your knowledge of the concept.